Automatic Cyclic Crack Propagation Calculations in Aircraft Engines

Guido Dhondt; Daniel Bremberg

doi:10.4028/www.scientific.net/KEM.417-418.733

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 417-418Automatic Cyclic Crack Propagation Calculations in...

Automatic Cyclic Crack Propagation Calculations in Aircraft Engines

Abstract:

This document describes a mixed-element approach to perform mixed-mode crack propagation calculations in an arbitrary structure in a fully automatic way. In a preprocessing step a cylindrical volume about the crack front is meshed with hexahedral elements while the remaining parts of the structure at interest are filled with tetrahedrons. Subsequently, a finite element calculation is performed yielding the stress field at the crack tip. The postprocessor determines the stress intensity factors and the 3-dimensional crack growth, leading to a new crack front. This procedure is repeated until a user-defined criterion is reached. The method is illustrated by an aircraft casing component.

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Periodical:

Key Engineering Materials (Volumes 417-418)

Pages:

733-736

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.417-418.733

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Online since:

October 2009

Authors:

Guido Dhondt, Daniel Bremberg

Keywords:

Crack Propagation, Cycle Extraction, Hexahedron, Mixed-Mode, Tetrahedron

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